Named after the Lanyang Plains (present day Yilan County), this museum was built next to Wushigang Harbor (烏石港) as a place where visitors can learn about the history, culture, landscape, and natural beauty of Yilan.

The museum was designed by Kris Yao to blend in with nature and inspired by local natural elements such as the cuesta, a rock-form commonly found along the northeast coast of Taiwan. At a distance, the building resembles a giant black rock (paying homage to Wushi Harbour, or black rock harbour), however up close the building is truly a unique design.

As the Lanyang Plains are where the ocean meets the mountains and rivers in Yilan, the museum's exhibits show Yilan's development over time with regard to its special landscape.

Visitors are first sent to the top level to begin the pyramid-shaped journey back down. Each floor is themed, from top to bottom Mountanous Level, Plains Level, Ocean Level, and Time Gallery, with two spaces for permanent exhibitions, a introduction exhibition near the entrance, and a Kid's Land on 1F.

Via Jiaoxi Hot Spring Village (宜蘭礁溪):
Take the MRT Brown Line 1 to Technology Building (科技大樓). Exit the station, cross the street, and turn right. After walking for a few minutes, on the left side is the Kamalan bus station (pictured here). After arriving in Jiaoxi (礁溪), take a taxi to Wushigang.